Answer:
Explanation:
Message will travel through the fibre at the speed of 3 x 10⁸ m /s which is also the speed of light .
a ) Time for a message to travel from US to France by using glass fibre link
time = distance / speed
= 6000 x 1000 / 3 x 10⁸
= .02 s .
b )
22000 miles = 1.6 x 22000
= 35200 km
Time for a message to travel from US to France by using a satellite link
time = distance / velocity
distance = 2 x √ ( 35200² + 3000² )
= 2 x 35327 km
= .7 x 10⁸ m .
time = .7 x 10⁸ / 3 x 10⁸
= .233 s
c )
Difference of time = .233 - .02
= .213 which is more than 1/6 s for which effect of hearing stays in the brain , which is called persistence of vision . So they will be heard as different sounds.
